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A bruise, also known as a contusion, is a type of hematoma of tissue, [3] the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration.
An ecchymosis is a hematoma of the skin larger than 10 mm. [2] They may occur among and or within many areas such as skin and other organs , connective tissues , bone , joints and muscle . A collection of blood (or even a hemorrhage ) may be aggravated by anticoagulant medication (blood thinner).
They measure 3–10 mm, [3] whereas petechiae measure less than 3 mm, and ecchymoses greater than 1 cm. [4] Purpura is common with typhus and can be present with meningitis caused by meningococci or septicaemia. In particular, meningococcus (Neisseria meningitidis), a Gram-negative diplococcus organism, releases endotoxin when it lyses.
Bruising is a type of acute soft tissue injury. Any type of injury that occurs to the body through sudden trauma, such as a fall, twist or blow to the body. A few examples of this type of injury would be sprains, strains and contusions.
A pulmonary contusion, also known as lung contusion, is a bruise of the lung, caused by chest trauma. As a result of damage to capillaries , blood and other fluids accumulate in the lung tissue. The excess fluid interferes with gas exchange , potentially leading to inadequate oxygen levels ( hypoxia ).
It refers to one of the three descriptive types of hematoma differentiated by size, the other two being ecchymosis (>1cm in diameter) and purpura (4 to 10mm in diameter). The term is typically used in the plural (petechiae), since a single petechia is seldom noticed or significant.
The ICD-10 Clinical Modification (ICD-10-CM) is a set of diagnosis codes used in the United States of America. [1] It was developed by a component of the U.S. Department of Health and Human services, [ 2 ] as an adaption of the ICD-10 with authorization from the World Health Organization .
Cerebral contusion (Latin: contusio cerebri), a form of traumatic brain injury, is a bruise of the brain tissue. [2] Like bruises in other tissues, cerebral contusion can be associated with multiple microhemorrhages, small blood vessel leaks into brain tissue. Contusion occurs in 20–30% of severe head injuries. [3]